Across 1. Dulles letters 4. Double-headed arrow, in a proof 7. Date anxiety cause 10. Bic model 12. Nicotine delivery system in a can 14. Old school plane prefix 15. Vegas numbers game 16. AT&T or Verizon, briefly 17. Diagnostic image 18. Part of bwoc 21. Obtained 22. Supreme Court Justice Samuel 23. Type of door 25. Monic starter 26. Portent 29. Nemesis 30. Hat, slangily 31. Black suit 33. Having cultlike esoteric spiritual knowledge 35. Rash newcomer 36. For-profit school corporation 37. No. needed for sending back a mail order 38. ___ just (ad slogan, “back-words”) 39. Type of sailing vessel 40. Half a dance? 41. Rubs out 42. “Have an ___” (down-to-earth wish) 44. Oneself (Fr.) 45. Part of Q.E.D. 50. Bonnie ___ 51. Medium whose existence Michelson and Morley contradicted 52. Ages 54. Better word than “receive” for grades

55. Spring term (abbr.) 56. Swiss river passing through Berne 57. ALF and Mork 58. Govt. ID 59. First word in any word problem solution Down 1. “Ewww!” 2. Alexander (alt.) 3. Flintstone pet 4. Mecca of Swedish furniture 5. ___ seal (envelope-stuffer’s to-do list) 6. Too expedient 7. My Hero ___ (Schoolhouse Rock song) 8. ___-Contra affair 9. Play 11. Pelosi and others 12. VA 7 in Leesburg and Tysons Corner, e.g. 13. Solution sets (points that satisfy conditions) 14. Concept that mathematicians accept as self-evident 19. 2000 lbs. 20. Sporty auto roof features 23. Discuss casually (with “about”) 24. Par follower 25. Audio recording equip. 27. Eharmony.com member’s objective 28. Gates and Jobs, arguably 29. Balt. utility 30. Vietnam Veterans Memorial designer 31. Relaxation zone 32. TI keystroke for saving data 34. Only (Rus.) 35. Actress Thurman 37. Longest common English word having no A, E, I, O, or U 40. Societal strata 41. Saturn model 43. Nonexistent or nonnumeric answers (abbr.) 44. Woman’s garment in India 45. Mild oath 46. Aural receptors 47. Horse controller 48. Russian river or mountain range 49. Female horse 50. Quilting event 53. It always has { } as a subset